摘要
本文以BH175F-1的双通道涡流室燃烧系统为研究对象。研究了双通道涡流室燃烧系统的缸内气体运动,并且通过改变ω主燃烧室的结构参数来研究不同主燃烧室结构参数对双通道涡流室式柴油机的缸内气体运动的影响。对比分析压缩上止点后主燃烧室的流场表明:适当的增加导流槽的角度可以改善主燃烧室的缸内运动,但是导流槽角度过大会使缸内气体运动恶化;在ATDC 20°CA(压缩上止点后20°)、ATDC 30°CA时,S1(主燃烧室阀坑深度2.5 mm)、S2(主燃烧室阀坑深度3.5 mm)在进排气阀坑形成完整的旋转涡流,涡核中心与进排气阀坑的几何中心重合。S1在对应的主燃烧室位置上气体运动速度较S2大。减小主燃烧室的深度有利于组织缸内二次涡流;W1(主燃烧室阀坑向进气阀坑一侧偏移1 mm)、W2(主燃烧室阀坑向进气阀坑一侧偏移1.5 mm)、W3(主燃烧室阀坑向进气阀坑一侧偏移2 mm)在阀坑形成较完整的二次涡流。从涡流的组织和气体运动速度分布可以看出,W2较W1、W3的缸内运动较好且分布区域较广。
In this paper,the dual-channel vortex chamber combustion system of BH175F-1 is taken as the research object.The in-cylinder gas motion of the dual-channel vortex chamber combustion system was studied,and the effects of different main combustion chamber structure parameters on the in-cylinder gas motion of the dual-channel vortex chamber diesel engine were studied by changing the structural parameters of theωmain combustion chamber.The comparative analysis of the flow field of the main combustion chamber after compression top dead center shows that:appropriately increasing the angle of the deflector can improve the in-cylinder motion of the main combustion chamber,but the excessive deflection groove angle will make the gas motion in the cylinder worse;at ATDC 20°CA(20°after top dead center compression),S1(main combustion chamber valve pit depth 2.5mm),S2(main combustion chamber valve pit depth 3.5mm)at the inlet and exhaust valve pits at ATDC 30°CA The vortex and vortex core coincide with the geometric center of the inlet and exhaust valve pits.S1 has a higher gas velocity than S2 at the corresponding position of the main combustion chamber.Decreasing the depth of the main combustion chamber is beneficial to organize the secondary vortex in the cylinder;W1(the main combustion chamber valve pit is offset by 1mm to the side of the intake valve pit),W2(the main combustion chamber valve pit is biased to the side of the intake valve pit Move 1.5mm),W3(the main combustion chamber valve pit is offset 2mm to the side of the intake valve pit)to form a relatively complete secondary vortex in the valve pit.It can be seen from the vortex organization and gas motion velocity distribution that W2 has better in-cylinder motion and wider distribution area than W1 and W3.
作者
袁文华
黄奇林
伏军
廖晶晶
孙振鹏
唐锐红
YUAN Wenhua;HUANG Qilin;FU Jun;LIAO Jingjing;SUN Zhenpeng;TANG Ruihong(School of Mechanical and Energy Engineering,Shaoyang University,Shaoyang 422000,China)
出处
《邵阳学院学报（自然科学版）》
2019年第6期41-49,共9页
Journal of Shaoyang University：Natural Science Edition
基金
国家自然科学基金项目(91541121)
邵阳学院研究生科研创新项目(CX2017SY001)
关键词
柴油机
双通道涡
流室燃烧系统
缸内气体运动
diesel engine
dual-channel
swirl-chamber combustion system
in-cylinder gas motion
